Or HaChaim on Deuteronomy 1:45/אור החיים על דברים א׳:מ״ה

1 ותשובו ותבכו לפני השם, "you returned and wept in the presence of the Lord." We need to analyze the meaning of this verse. If the meaning is that these people returned from their ill-fated attempt to conquer the mountain and that they wept over their failure and the casualties they had suffered at the hands of the Emorites, this is certainly not made plain by the wording of the verse. Besides, if so, what is the meaning of such expressions as: "G'd did not hearken, and G'd did not give ear?" If the weeping concerned an event which had already occurred, such expressions are pointless! We must assume therefore that what Moses is telling us is that only after the defeat by the Emorites did the Israelites finally decide to humble themselves before the Lord, becoming penitents. They wept in recognition of their great guilt. Nonetheless, and in spite of their profession of humility, G'd did not listen to their prayers, i.e. He did not reverse the evil decree He had issued.